BR0116961A - Transmitter for a wireless communications system using multiple codes and multiple antennas - Google Patents

Transmitter for a wireless communications system using multiple codes and multiple antennas

Info

Publication number
BR0116961A
BR0116961A BR0116961-0A BR0116961A BR0116961A BR 0116961 A BR0116961 A BR 0116961A BR 0116961 A BR0116961 A BR 0116961A BR 0116961 A BR0116961 A BR 0116961A
Authority
BR
Brazil
Prior art keywords
transmitter
antennas
codes
transmit
wireless communications
Prior art date
Application number
BR0116961-0A
Other languages
Portuguese (pt)
Inventor
Wen Tong
Mikhail G Bakouline
Vitali B Kreindeline
Yuri S Shinakov
Alexandre M Chloma
Original Assignee
Nortel Networks Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nortel Networks Ltd filed Critical Nortel Networks Ltd
Publication of BR0116961A publication Critical patent/BR0116961A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0678—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using different spreading codes between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Abstract

"TRANSMISSOR PARA UM SISTEMA DE COMUNICAçõES SEM FIO USANDO CóDIGOS MúLTIPLOS E ANTENAS MúLTIPLAS". Em um transmissor de um sistema de comunicações sem fio que tem M antenas de transmissão (10) , cada antena de transmissão é fornecida com um respectivo sinal combinado que compreende um grupo respectivo de M grupos cada de N sub-feixes de dados, dispersos ortogonalmente por N seq³ências de códigos ortogonais (W1 a WN). As N seq³ências de códigos ortogonais usadas para cada um dos M grupos compreendem uma combinação respectiva de M diferentes combinações de N dentre N~ w~ seq³ências de códigos ortogonais, onde N~ w~ > N. M e N são inteiros maiores que um. os sinais combinados podem também incluir sinais piloto dispersos ortogonalmente (WP) para estimativa de canais em um receptor. A ortogonalidade dos sinais transmitidos a partir das antenas de transmissão é aumentada, de modo que a potência do sinal de transmissão pode diminuir e/ou o receptor pode ter menos que M antenas de recepção."TRANSMITTER FOR A WIRELESS COMMUNICATION SYSTEM USING MULTIPLE CODES AND MULTIPLE ANTENNAS". In a transmitter of a wireless communication system having M transmit antennas (10), each transmit antenna is provided with a respective combined signal comprising a respective group of M groups each of N orthogonally dispersed data subbeams. by N sequences of orthogonal codes (W1 to WN). The N orthogonal code sequences used for each of the M groups comprise a respective combination of M different combinations of N among N ~ w ~ orthogonal code sequences, where N ~ w ~> N. M and N are integers greater than one. The combined signals may also include orthogonally dispersed (WP) pilot signals for channel estimation at a receiver. The orthogonality of the signals transmitted from the transmit antennas is increased, so that the transmit signal strength may decrease and / or the receiver may have less than M receive antennas.

BR0116961-0A 2001-04-05 2001-04-05 Transmitter for a wireless communications system using multiple codes and multiple antennas BR0116961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2001/000135 WO2002082687A1 (en) 2001-04-05 2001-04-05 Transmitter for a wireless communications system using multiple codes and multiple antennas

Publications (1)

Publication Number Publication Date
BR0116961A true BR0116961A (en) 2005-01-11

Family

ID=20129609

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0116961-0A BR0116961A (en) 2001-04-05 2001-04-05 Transmitter for a wireless communications system using multiple codes and multiple antennas

Country Status (9)

Country Link
US (1) US7280466B2 (en)
EP (2) EP1705808A1 (en)
JP (1) JP4704667B2 (en)
KR (1) KR100720635B1 (en)
CN (1) CN1299442C (en)
BR (1) BR0116961A (en)
DE (1) DE60121476T2 (en)
HK (1) HK1061938A1 (en)
WO (1) WO2002082687A1 (en)

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US7145940B2 (en) * 2003-12-05 2006-12-05 Qualcomm Incorporated Pilot transmission schemes for a multi-antenna system
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CN1941664A (en) * 2005-09-30 2007-04-04 松下电器产业株式会社 Transmission antenna selecting method and apparatus based on judge feedback in radio communication system
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US8023398B2 (en) * 2007-01-30 2011-09-20 Qualcomm Incorporated Using a single FHT to decode access-based handoff probes from multiple users
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US8353006B2 (en) * 2008-05-07 2013-01-08 Livetv, Llc Aircraft communications system using whitelists to control access and associated methods
EP2329605A4 (en) * 2008-09-22 2013-04-17 Nortel Networks Ltd Method and system for space code transmit diversity of pucch
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Also Published As

Publication number Publication date
KR20030085098A (en) 2003-11-01
KR100720635B1 (en) 2007-05-21
US7280466B2 (en) 2007-10-09
US20030081539A1 (en) 2003-05-01
WO2002082687A1 (en) 2002-10-17
EP1374443A1 (en) 2004-01-02
DE60121476T2 (en) 2007-02-22
EP1705808A1 (en) 2006-09-27
CN1507706A (en) 2004-06-23
EP1374443B1 (en) 2006-07-12
JP4704667B2 (en) 2011-06-15
HK1061938A1 (en) 2004-10-08
JP2004535094A (en) 2004-11-18
CN1299442C (en) 2007-02-07
DE60121476D1 (en) 2006-08-24

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 5A, 6A E 7A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: EM VIRTUDE DO ARQUIVAMENTO PUBLICADO NA RPI 1964 DE 26/08/2008 E CONSIDERANDO A AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS.